53281633 has 2 divisors, whose sum is σ = 53281634. Its totient is φ = 53281632.

The previous prime is 53281607. The next prime is 53281693. The reversal of 53281633 is 33618235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42146064 + 11135569 = 6492^2 + 3337^2 .

It is a cyclic number.

It is not a de Polignac number, because 53281633 - 2²¹ = 51184481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53281595 and 53281604.

It is not a weakly prime, because it can be changed into another prime (53281693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26640816 + 26640817.

It is an arithmetic number, because the mean of its divisors is an integer number (26640817).

Almost surely, 2^53281633 is an apocalyptic number.

It is an amenable number.

53281633 is a deficient number, since it is larger than the sum of its proper divisors (1).

53281633 is an equidigital number, since it uses as much as digits as its factorization.

53281633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 53281633 is about 7299.4268953117. The cubic root of 53281633 is about 376.2927425385.

Adding to 53281633 its reverse (33618235), we get a palindrome (86899868).

The spelling of 53281633 in words is "fifty-three million, two hundred eighty-one thousand, six hundred thirty-three".